An instrumental analysis method for the determination of stable silicon isotope ratio using multi-collector inductively coupled plasma mass spectrometry ( MC-ICP-MS) was established. In dry plasma mode, silicon isotopes suffered from the spectrum polyatomic interferences of C, N, O, H at medium resolution. The sample gas flow had significant effect on the silicon sensitivity and signal stability. Besides, higher sample gas flow lead to higher production of 14N16O. Consistent δ29Si and δ30Si within 0. 04‰ (1σ) could be obtained over a mass range of ca. 9 milli-amu at the lower mass side of silicon at medium resolution. The analyte concentrations of the sample and reference material were matched within 20% to avoid concentration effect on the determination of silicon isotopes using standard-sample-bracketing correction method. The measurements were not sensitive to the acid molarity and Cl matrix. An internal precision of less than 8×10-6(1σ) could be achieved for 29 Si/ 28 Si and 30 Si/ 28 Si by taking an integration time of 8 seconds. The long-term reproducibility of 0 . 06‰-0 . 10‰ ( 2σ, n=20 ) was obtained for δ29 Si and δ30 Si by repeating the analysis of the silicon reference materials, whilst the determined isotopic value for GBW04421 and GBW04422 were in good agreement with the recommended data, suggesting the precision and robustness of this method. The measured silicon isotopic values of fresh waters ( river and lake waters ) , saline waters and seawater demonstrated the capability of applying this method to trace the biogeochemical processes of silicon in natural waters.

Objective To evaluate left ventricular regional volume and function of the patients with myocardial infarction by real-time three-dimensional echocardiography.Methods The study consisted of 24 normal subjects and 27 patients with myocardial infarction.Three-dimensional image data were acquired and were analysed offline.Regional volume curves and regional ejection fraction curves were derived.Regional diastolic volumes,regional systolic volumes and regional ejection fractions were compared respectively between two groups.Results The normal regional volume curves and regional ejection fraction curves were regular parabola.The regional volume increased and ejection fraction decreased in the zones with infarction,and the amplitudes of the regional volume curves and the regional ejection fraction curves decreased.Conclusions Real-time three-dimensional echocardiography can evaluate left ventricular regional volume and regional function objectively.

Aged ; Anthracosis ; complications ; metabolism ; pathology ; Cyclin-Dependent Kinase Inhibitor p16 ; metabolism ; Humans ; Lung ; metabolism ; pathology ; Lung Neoplasms ; complications ; metabolism ; pathology ; Male ; Middle Aged ; Retinoblastoma Protein ; metabolism

Humans ; Lipid Peroxidation ; Male ; Pneumoconiosis ; metabolism ; Superoxide Dismutase ; blood

Child ; China ; Humans ; Paramyxoviridae Infections ; physiopathology ; Respiratory Tract Infections ; physiopathology ; virology

The morphological indexes of the Scuophularia ningpoensis seedlings including the longth, diameter and weight were measured, clustering analysis was used to set up the standard quality grading of seedlings of S. Ningpoensis by SPSS. Field experiment was carried out to measure the indicators of plants growth and development, the yield and the quality. The results showed that the growth and yield of class I seedlings were better than those of class II and III. The content of main active ingredients was affected barely by seedlings classification. To ensure the quality, class II seedlings or above should be used for plantation. The established quality classification standard of S. ningpoensis seedlings was scientific and feasible, and provides the basis for the standardized cultivation of S. ningpoensis.
Drugs, Chinese Herbal ; analysis ; standards ; Quality Control ; Scrophularia ; chemistry ; classification ; growth & development ; Seedlings ; chemistry ; growth & development

Objective To investigate the effects of Working Memory Training System on working memory impairment after brain injury. Methods From November, 2013 to March, 2015, 20 patients of brain injury with impairment of working memory were divided into training group (n=10) and control group (n=10). The training group was trained with the Working Memory Training System for four weeks, while the control group did not accept any cognitive rehabilitation. They were tested with digital forwards/backwards, space forwards/backwards, n-back test and Everyday Memory Questionnaire before and after training. Results All of the tests improved more in the training group than in the control group (Z>2.014, P<0.05), except that of digital forwards, as well as the score of Everyday Memory Questionnaire (Z=1.970, P=0.049). Conclusion Application of Working Memory Training System can improve the ability of memory in patients with brain injury, both the working memory and everyday memory.

Aim: To compare the stability of Endostar~(TM) and endostatin under different temperatures and pH using polyacrylamide gel electrophoresis( PAGE) and Western blot and to compare the activity of Endostar kept at 4 ℃ and 37 ℃ by inhibition of endothelial cell proliferation. Methods: Endostar and endostatin expressed by Phicha pastoris were kept at 4 ℃, and 37 ℃ for 96 hours, respectively. The electrophoresis of the samples was detected by reduced and non-reduced PAGE. The results were further confirmed by Western blot with rabbit anti-Endostar polyclonal antibody. The inhibitory effect of Endostar stored at different temperatures on HUVEC was also exam-ined by cell-based assay. Results: Single band at 20 kD was detected in all lanes of SDS-PAGE gel loaded with endostatin and Endostar samples under reducing condition. In acidic native PAGE with three different pH values, endostatin showed a smear characteristic, whereas Endostar showed a unique band in acidic non-continuous native PAGE. Although the smear phenomenon was also observed under two conditions of constant native elec-trophoresis, the major band of Endostar could be detected. Similar electrophoretic behavior was found for endosta-tin and Endostar stored at both 37 ℃ and 4 ℃ . Western blot showed similar results to those by PAGE. Furthermore, Endostar stored at these two temperatures also had identical inhibitory effect on proliferation of HUVEC. Conclusion: Endostar and endostatin exhibit similar thermostability at regular conditions, but Endostar was more stable than endostatin expressed in P. pastoris under acidic condition.

Objective To clarify the role of claudin-4 in endometrial tumorigenesis and explore claudin-4 be as potentially useful agent in the treatment of endometrial carcinoma.Methods The expression of claudin-4 in 62 endonetrioid endometrial carcinoma (EEC),30 atypical hyperplasia endometrial tissue and 60 human normal endometrium was determined using immunohistochemistry and realtime PCR.Ninety female BALB/c mice were transplanted with Ishikawa endometrial cancer cells,which were divided into three groups with different intraperitoneal treatments with cisplatin,paclitaxel and saline solution.After the observation period,the tumors were extracted and stained with monoclonal antibody against claudin-4.The messenger RNA expression of claudin-4 was also detected using real-time PCR.Results Among the EEC samples,34％ (21/62) showed medium staining for claudin-4 and 66％ (41/62) showed intense staining.In atypical hyperplasia group,27％ (8/30) showed weak staining,53％ (16/30) showed medium staining and 20％ (6/30) showed intense staining for claudin-4.Of the normal endometrial tissue,47％ (28/60) showed weak staining and 53％ (32/60) showed no staining for claudin-4.According to real-time PCR,the relative quantity of claudin-4 was 170 ± 12 in EEC group,89 ± 15 in atypical hyperplasia group and 18 ± 3 in normal endometrium.Compared with those in atypical hyperplasia group and normal endometrium group,the protein and mRNA expression of claudin-4 were significantly increased in the group of EEC (all P ＜ 0.05).In the study of Ishikawa xenografts,no significant changes in tumor volume and claudin-4 expression were shown in paclitaxel group compared with that in the control group.Nevertheless,a significant reduction of the tumor growth and a significant decrease in claudin-4 expression were observed in cisplatin group.After cisplatin treatment,the tumor volume was significantly decreased [(0.51 ±0.21) versus (0.73 ±0.12) cm3],and the mRNA expression of claudin-4 was also significantly decreased (153 ± 35 versus 273 ± 27).Conclusion These results demonstrate that claudin-4 is strongly expressed in EEC,which may be a useful biomarker to monitor the effects of chemotherapy in patients with endometrial carcinoma.

Objective To prohc into the distinguished feature of postoperation of early inflammatory intesti- nal and the principle of diagnosis and treatment.Methods 23 cases of early intestinal postoperatively treated during the year of 2003 to 2005 were analysed.Results In the 23 cases,20 of them were treated conservatively while 3 of them were treated operatively,both of which were recovered and dischanged from hospital.Conclusion The early inflammatory intestinal postoperatively is a kind of special one in which both mechanical factor and dynamic factor could be found.Most of the patients could be cured by conservative way and they should surely be in closed observa- tion of the condition in order to be handled properly.